INSTALLATION
HVAC WIRING DIAGRAMS
LEAVING AIR TEMPERATURE SENSOR (OPTIONAL)
CONVENTIONAL HEAT/COOL SINGLE TRANSFORMER (USE JUMPER)
Leaving air temperature can be measured by attaching an 8052 sensor to the LAT terminals . The leaving air
temperature sensor measurement is displayed during the installer test for diagnostic purposes .
IMPORTANT
Do not mount the sensor in direct line-of-sight of the heat exchanger, cooling coils, or UV lights as this may cause
the sensor to report false temperature readings .
1 . Locate the Aprilaire Model 8052 sensor in the supply trunk, after the heat exchanger and cooling coils . (See
shaded areas in figure below .)
2 . Mount the sensor according to the installation instructions provided with the sensor .
3 . Wire the sensor to the equipment control module LAT terminals .
W
W2
W3
Y
Y2
Y3
G
HC HP
EQ
3
C
RC
RH
L
G
O
Y2
Y
B
W2
W
R
C
TRANSFORMER
2
nd
HEATING
1
st
HEATING
THERMOSTAT
FAN
1
st
COOLING
2
nd
COOLING
2
1
3
rd
HEATING
3
nd
COOLING
LOCATE
SENSOR
IN SHADED
AREA .
CONVENTIONAL HEAT/COOL TWO TRANSFORMER (REMOVE JUMPER)
HEATING TRANSFORMER
COOLING TRANSFORMER
C
R
W
W2
B
Y
Y2
O
G
L
RH
RC
C
3
EQ
HP
HC
G
Y3
Y2
Y
W3
W2
W
TRANSFORMER
THERMOSTAT
1
2
2
nd
COOLING
1
st
COOLING
FAN
1
st
HEATING
2
nd
HEATING
3
rd
HEATING
3
rd
COOLING
1
R and C can be
powered from the
HVAC equipment
transformer or any
other constantly
powered 24VAC
source.
1
RETURN AIR TEMPERATURE SENSOR (OPTIONAL)
Return air temperature can be measured by attaching an 8052 sensor to the RAT terminals . The return sensor must
be enabled in the installer set-up menu . The return air temperature sensor provides protection in the event that the
equipment control module loses connection with the thermostat . In the event that the thermostat connection is lost,
the equipment control module will use the return air temperature sensor to maintain a temperature greater than 40°F
and less than 100°F .
1 . Locate the Aprilaire Model 8052 sensor
in the return trunk .
2 . Mount the sensor according to the
installation instructions provided with
the sensor .
3 . Wire the sensor to the equipment
control module RAT terminals .
English
7
6
English
